Manufacture of rubber shoes.



grit rt "on m loll) tel rte ED lt/AED C. G.l.VIN, 0F BltLItS'lOL, RHODE ISLAND, ASSIGNOR OI? ONE-'HALF "JTO .tt'UG USTtUS 0. IBOUItN, 0F BRISTOL, RHODE ISLAND.

DEMUFTTLTPAC'EU'ILE 01E RUBBER SHOES.

No thawing.

To (till: vi /mm it may concern:

lle it lCIlOWl] that l ltlowaun U. ti'AVlN, a ei't'iaenot the lnitetl States, residingat Bristol, in the county of Bristol and State of lthotle l slancl, have inventctl certain new antl useful improvements in the ltlanutacture of .ltubber Shoes, of which the following is a specification.

My invention relates to the numulzmture otrubhin' shoes in molds, anti means where by to protluce the article without .torcing the rubber coating nnctuly into or throuigh the interstices of the fabric to which the coating is applied. to the ortlinary manulacture of such rubber shoes it is common to cut a fabric coated with a vuleanizabte coating -into sections, which latter are assembled properly within a inoltl, and pressure applied to force the sections against the Hl()l(l. This pressure is gene ally heavy, and is very apt to force the rubber into the interstices of the fabric. This is, in many ases, extremely unde irable as it destroys the ap pearauce of the 't'abric tHHi ot the article, whether the fabric be upon the outsitle of the article or within the same. Further, when the Fabric is of knittetl or elastic goods, the forcing ot the rubber into the intert-itices interferes with the elasticity to an untlesir able extent. To obviate these objections vulcanizc to :1 gr alter or less extent the coinp'osition on the fabric, either by heating to a proper extent the coated tabric betore cuttingit into sections. or h ating, the eoatecl sections utter cuitin the vulcanization it? ing continued to such an extent as will hat-(ten the coating sullicicnt 1y to prevent the rubber l'roin llowin into the interstices when pressure is subsequently supplied. lrelcrabtr the coating is rub-animal to the retpiirctl tlcn'ree antl the sections ol' the ar ticlc are then put together in the nioltl. with cem nt it necessary. together with the other portions ol the shoe, and pressure is applictl, and the article is heated until the vulcanization is completed.

As a result ot preparing the, sections from which the article is made so that the coating thereon is vulcanixetl tliltl hartlenetl sulliciently to prevent the pressure, from forcing Specification of Le tteri: Iatent.

latcntett .ltieln t,

application filed May 10, 1906. Serial No. 316,198.

it into the interstices, l ain enabled to secure a tunshetl article in which the rubber and the fabric are firmly connected. but in which the fabric is not (lelacctl by the presence of rule articles, which consists in vulcaniaing a rub-- bcr covered tabric to the extent sullicient to prevent the rubber from being pressctl into the interstices. assembling in a rnohi. motif: ing: untlcr pressure, and then completing the vulcanization.

3. The process ol nuinul'acturing rubber articles, which consists in vulcaniaing a rubber corcrerl l'abric to the extent sullicicnt to prevent the rubber l'roin being pressetl into the interstices. asseinbliiug in a niohl, ancl subjecting to pressure autl heat while in the nioltl to inolrl amt rulcanize the same.

l. In the inanutm'ture ol rubber shoes, first preparingshoe sect ions ccmsisting each of a piece of :l'ahric with a rubber coating in a partially vulcanized conrlition, then assembling said sections within a mold with other parts of the shoe, then subjecting the same to pressure, tllltl to heat to complete the vul :anization asset forth.

5. The process herein set forth, of making rubber. shoes. the same consisting' in lirst coating: a textile fabric with a vultanizable composition, then partially vul ranizinglhe entire coating, then cutting the fabric into sections, assembling saitl sections within a. mold anti subjecting them to pre sure antl to heat to complete the vul :anization.

ln'testiinony whereof I allix my signature in presence ot two witnesses.

Witnesses A. 0. 130mm, H. H. lhcnunn.

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